diff options
Diffstat (limited to 'lib/sqlalchemy/schema.py')
| -rw-r--r-- | lib/sqlalchemy/schema.py | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/sqlalchemy/schema.py b/lib/sqlalchemy/schema.py index 1763dc484..25c7e30a2 100644 --- a/lib/sqlalchemy/schema.py +++ b/lib/sqlalchemy/schema.py @@ -2008,7 +2008,13 @@ class ForeignKeyConstraint(Constraint): # string-specified column names now get # resolved to Column objects if isinstance(col, basestring): - col = table.c[col] + try: + col = table.c[col] + except KeyError: + raise exc.ArgumentError( + "Can't create ForeignKeyConstraint " + "on table '%s': no column " + "named '%s' is present." % (table.description, col)) if not hasattr(fk, 'parent') or \ fk.parent is not col: |